镉(Cd)是非必需的有毒元素,是农业环境和农产品的重要污染物,因此,Cd的毒性效应已成为国内外研究的热点。小麦作为毒性实验推荐的标准物种之一,了解其对Cd的吸收过程及其致毒机理具有重要意义。采用SPSS和Origin进行统计分析得出,小麦生长指标与对照相比差异显著,且呈现明显的剂量-效应关系,根长降低幅度较大,Cd对于根的毒性作用较强,根对于污染胁迫响应较敏感。抗氧化酶活性显著性升高,这是Cd~(2+)胁迫下小麦的一种防御机制。本研究通过显著性差异分析得出株高和鲜重的无可见效应浓度和最低可见效应浓度值分别为1.12 mg/L和5.62 mg/L。 Cadmium (Cd) is a non-essential toxic element and is an important pollutant in agricultural environment and agricultural products. Therefore, the toxic effect of Cd has become a hot spot at home and abroad. As one of the standard species recommended by toxicity experiment, it is important to understand the absorption process of Cd and its toxic mechanism. SPSS and Origin were used for statistical analysis. The results showed that the wheat growth index was significantly different from that of the control, and showed significant dose-effect relationship. The root length decreased significantly, while the Cd toxicity to the root was stronger. The root response to the pollution stress More sensitive. The antioxidant enzyme activity was significantly increased, which is a Cd ~ (2+) stress wheat defense mechanism. In this study, the significant differences between plant height and fresh weight no visible effect concentration and the lowest visible effect concentration were 1.12 mg / L and 5.62 mg / L.